Gravity-lock for windows.



PATENTED SEPT. 4, 1906.

W. A. HEARTT.

GRAVITY LOCK FOR WINDOWS.

APPLICATION FILED JUNE 9, 1006.

UNITED STATES PATENT OFFICE.

WILLIAM A. HEARTT, OF NEIV YORK, N. Y., ASSIGNOR TO FRANK VOIGTMANN, OF CHICAGO, ILLINOIS, AND SILAS H. POMEROY, OF NEl/V YORK, N. Y., COMPOSING THE FIRM OF VOIGTMANN AND COMPANY, OF CHICAGO, ILLINOIS.

GRAVITY-LOCK FOR WINDOWS.

Specification of Letters Patent.

Patented Sept. 4, 1906.

Application filed June 9, 1905. Serial No. 264.401-

To all whom it may concern:

Be it known that I, IVILLIAM A. HEARTT, a citizen of the United resident of New York, State of New York, have invented a certain new and useful Improvement in Gravity-Locks for WVindows, of which the following is a specification.

My invention contemplates an improvement on the form of window-lock shown and described in application, Serial No. 261,172, filed by me in the United States Patent Oflice on the 19th day of May, 1905.

Generally stated, the object of my invention is the provision of an improved and highly-efiicient window-lock of the general character shown and described in my said prior application.

A special object is to provide certain details of construction and features of improvement tending to increase the general efficiency and serviceability of a window-lock of this particular character.

To the foregoing and other useful ends my invention consists in matters hereinafter set forth and claimed.

In the accompanying drawings, Figure 1 is an inside view of a window provided with a lock embodying the principles of my inven tion. Fig. 2 is an enlarged front elevation of said lock. Fig. 3 is a vertical section on line 3 3 in Fig. 2.

My improved lock can be applied to different kinds of windows. As shown, the window comprises a frame A, an upper tilting or swinging sash B, and a lower sash C. Said upper sash is provided with pivots b and is thus ad. ted to tilt about a horizontal axis. Preferab y the upper end of the sash B swings inward and its lower end swings outward. My improved lock for locking the tilting sash in its upright or normal position comprises a bracket-plate D, provided with vertical slots (Z, through which extend the screws (1, which adjustably hold the plate in place upon the head or upper portion of the window-frame A. A locking-dog E is pivotally mounted upon the said plate and so formed that it will hang obliquely when the window is open. The said locking-dog has an axis 6, about which itis adapted to swing upward and outward when it is pushed out of the way by the upper portion of the sash Bthat is, when the window is closed. An-

States of America, and a other bracket-plate F is secured to the upper portion of the sash B by means of screws This plate F has an inclined or beveled contact-surfacef for the end of the locking-dog E. It is also provided with a pair of ears f and with stops f and f. A weighted releasing-lever G is pivotally mounted upon said ears and has its inner weighted end portion 9 adapted to engage the under side of the releasing-dog. The said lever is adapted to suing about its axis g and is also provided with an outer arm 9*. At its inner end the said lever is provided with a lug 9 adapted to play between the two shoulders) and f An operating cord or chain H is attached to the said arm g IVith this arrangement a pull on the said cord or chain will raise the inner end of the releasing-lever G and will cause the same to engage and lift the lockingdog E out of locking engagement with the contact-surfacej". The pull 011 the cord or chain then being continued, the window-sash B will be pulled into the desired position. By temporarily securing the cord or chain to a catch or other device 0 on the lower sash the upper sash can be retained in its open or inclined position. In this way it is the initial pull on the connection for drawing open the window which serves automatically to release the locking-dog. When the window is closed, the dog drops readily into place, and while the window remains closed the weight of the dog tends constantly to produce a wedging pressure in a direction to more firmly close the window. Thus the lock is capable of a self-tightening action until the contact-surface f is entirely worn away and until the plate D reaches the limit of its downward adjustment, and, as stated, it is the inner end of a weighted lever which is used for lifting the dog out of engagement with the sash. In this way the pull is exerted on the outer end of the lever, and the movement of the weight is in the same direction as the opening movement of the sash. Furthermore, the cord or chain is conveniently and accessibly attached to the outer end of the lever.

The plate F constitutes a stop which is provided with the releasing-lever G and the thereby lift the said locking-dog out of lockbevel or contact surface f for the end of'the pivoted locking-dog.

What I claim as my invention is In combination with a window frame and sash, a window-1ock comprising a bracket on the 7 frame, a locking-dog pivoted on said bracket, a stop carried by the sash and provided with a contact-surface, and a weighted releasing-lever pivoted on said stop and provided with a weighted inner end portion adapted to swing upward and outward, and

ing engagement with said contactsurface, the said locking-dog being pivoted at the outer edge of the window-frame and adapted to swing inwardly underneath the same and be supported by the said contact-surface on the stop.

Signed by me this 3d day of June, 1905. 2::

WILLIAM A. HEARTT. Witnesses E. H. TUCKER, ALICE Woon; 

